I have the 02 ******...

[icarl]

and have heard that it is better than the newer trannys (03+) for the gas kj at low end torque and strength wise. But what about the 05/06 diesel kj? How does it compare to the 02 ******?

 

[JeepJeepster]

You get a cookie!

They are the same ****** except the Diesel kj has 5 gears. Hence 545rfe.

 

[Marlon_JB2]

They are the same except the one in the diesel KJ has 5 gears. There is no physical difference, the only difference is the programming.

 

[MoladoGuy]

You get a cookie!

They are the same ****** except the Diesel kj has 5 gears. Hence 545rfe.

They are the same except the one in the diesel KJ has 5 gears. There is no physical difference, the only difference is the programming.

I thought you both posted at the same time but then realized the 25 minute difference. LOL.

 

[tjkj2002]

They are the same except the one in the diesel KJ has 5 gears. There is no physical difference, the only difference is the programming.

Not true,the 545RFE IS DIFFERENT inside then the 45RFE,look up the parts #'s for the internals,They do use some of the same stuff but not all is the same.

Oh and the 45RFE is really a 5speed auto,it has two 2nd gears but the programming only allows the other 2nd gear to be used in kick down at highway speeds.

The 545RFE is really a 6speed auto,same wtory as the 45RFE with the two 2nd gears but also has a second overdrive ratio.

 

[JeepJeepster]

A bunch of people were getting their 45rfe's in the grands reprogrammed as a 545rfe. They did not change any internals.

 

[tjkj2002]

A bunch of people were getting their 45rfe's in the grands reprogrammed as a 545rfe. They did not change any internals.

Then they do not have a 545RFE,the 2 are different.They may just have had it programed to unlock the other 2nd gear for normal driving and claim to have a 545RFE.The cases are the same but the different internals is what determines what are the gear ratios and how many you get.

 

[JeepJeepster]

This leads me to believe they are the same, but I didnt read it all.

http://hotrodlane.cc/New HEMI Tech/2004 57 hemi trans.pdf

 

[icarl]

You get a cookie!

I hope its chocolate! Thanks.

 

[icarl]

They may not be exactly the same but should have similar strengths and low end torque. Right?

 

[JeepJeepster]

Should. Depends what 'internals' that tjkj says are different. You should never have any troubles out of either ****** since they used the 545 behind the hemi and the 45rfe behind the 4.7..

 

[myjeepwalks]

I got 95k on my 45rfe and it's still like new.


Shouldn't of said that since now it'll probably take a dump this week.

 

[icarl]

I have over 130K on mine now and haven't had any problems with the transmission or engine.